Why Greenland? Political History professor shares analysis on President's goal of U.S. ownership.

European Union leaders met in an emergency session today after President Donald Trump threatened to impose a 10 percent tariff on several European countries for their opposition to his control of Greenland. Will this tactic work? Will Denmark end up handing over Greenland? UC Santa Cruz media and political history lecturer Nolan Higdon shares insight and analysis on KTVU's Take 2 This Morning.